225 lines
7 KiB
C
225 lines
7 KiB
C
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/** @file
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Implementation of collecting the statistics on a network interface.
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Copyright (c) 2004 - 2010, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "Snp.h"
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/**
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Resets or collects the statistics on a network interface.
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This function resets or collects the statistics on a network interface. If the
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size of the statistics table specified by StatisticsSize is not big enough for
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all the statistics that are collected by the network interface, then a partial
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buffer of statistics is returned in StatisticsTable, StatisticsSize is set to
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the size required to collect all the available statistics, and
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EFI_BUFFER_TOO_SMALL is returned.
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If StatisticsSize is big enough for all the statistics, then StatisticsTable
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will be filled, StatisticsSize will be set to the size of the returned
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StatisticsTable structure, and EFI_SUCCESS is returned.
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If the driver has not been initialized, EFI_DEVICE_ERROR will be returned.
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If Reset is FALSE, and both StatisticsSize and StatisticsTable are NULL, then
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no operations will be performed, and EFI_SUCCESS will be returned.
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If Reset is TRUE, then all of the supported statistics counters on this network
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interface will be reset to zero.
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@param This A pointer to the EFI_SIMPLE_NETWORK_PROTOCOL instance.
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@param Reset Set to TRUE to reset the statistics for the network interface.
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@param StatisticsSize On input the size, in bytes, of StatisticsTable. On output
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the size, in bytes, of the resulting table of statistics.
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@param StatisticsTable A pointer to the EFI_NETWORK_STATISTICS structure that
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contains the statistics. Type EFI_NETWORK_STATISTICS is
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defined in "Related Definitions" below.
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@retval EFI_SUCCESS The requested operation succeeded.
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@retval EFI_NOT_STARTED The Simple Network Protocol interface has not been
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started by calling Start().
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@retval EFI_BUFFER_TOO_SMALL StatisticsSize is not NULL and StatisticsTable is
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NULL. The current buffer size that is needed to
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hold all the statistics is returned in StatisticsSize.
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@retval EFI_BUFFER_TOO_SMALL StatisticsSize is not NULL and StatisticsTable is
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not NULL. The current buffer size that is needed
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to hold all the statistics is returned in
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StatisticsSize. A partial set of statistics is
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returned in StatisticsTable.
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@retval EFI_INVALID_PARAMETER StatisticsSize is NULL and StatisticsTable is not
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NULL.
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@retval EFI_DEVICE_ERROR The Simple Network Protocol interface has not
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been initialized by calling Initialize().
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@retval EFI_DEVICE_ERROR An error was encountered collecting statistics
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from the NIC.
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@retval EFI_UNSUPPORTED The NIC does not support collecting statistics
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from the network interface.
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**/
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EFI_STATUS
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EFIAPI
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SnpUndi32Statistics (
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IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
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IN BOOLEAN Reset,
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IN OUT UINTN *StatisticsSize, OPTIONAL
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IN OUT EFI_NETWORK_STATISTICS *StatisticsTable OPTIONAL
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)
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{
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SNP_DRIVER *Snp;
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PXE_DB_STATISTICS *Db;
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UINT64 *Stp;
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UINT64 Mask;
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UINTN Size;
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UINTN Index;
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EFI_TPL OldTpl;
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EFI_STATUS Status;
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//
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// Get pointer to SNP driver instance for *This.
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//
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if (This == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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Snp = EFI_SIMPLE_NETWORK_DEV_FROM_THIS (This);
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OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
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//
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// Return error if the SNP is not initialized.
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//
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switch (Snp->Mode.State) {
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case EfiSimpleNetworkInitialized:
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break;
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case EfiSimpleNetworkStopped:
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Status = EFI_NOT_STARTED;
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goto ON_EXIT;
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default:
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Status = EFI_DEVICE_ERROR;
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goto ON_EXIT;
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}
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//
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// if we are not resetting the counters, we have to have a valid stat table
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// with >0 size. if no reset, no table and no size, return success.
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//
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if (!Reset && StatisticsSize == NULL) {
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Status = (StatisticsTable != NULL) ? EFI_INVALID_PARAMETER : EFI_SUCCESS;
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goto ON_EXIT;
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}
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//
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// Initialize UNDI Statistics CDB
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//
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Snp->Cdb.OpCode = PXE_OPCODE_STATISTICS;
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Snp->Cdb.CPBsize = PXE_CPBSIZE_NOT_USED;
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Snp->Cdb.CPBaddr = PXE_CPBADDR_NOT_USED;
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Snp->Cdb.StatCode = PXE_STATCODE_INITIALIZE;
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Snp->Cdb.StatFlags = PXE_STATFLAGS_INITIALIZE;
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Snp->Cdb.IFnum = Snp->IfNum;
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Snp->Cdb.Control = PXE_CONTROL_LAST_CDB_IN_LIST;
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if (Reset) {
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Snp->Cdb.OpFlags = PXE_OPFLAGS_STATISTICS_RESET;
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Snp->Cdb.DBsize = PXE_DBSIZE_NOT_USED;
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Snp->Cdb.DBaddr = PXE_DBADDR_NOT_USED;
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Db = Snp->Db;
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} else {
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Snp->Cdb.OpFlags = PXE_OPFLAGS_STATISTICS_READ;
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Snp->Cdb.DBsize = (UINT16) sizeof (PXE_DB_STATISTICS);
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Snp->Cdb.DBaddr = (UINT64)(UINTN) (Db = Snp->Db);
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}
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//
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// Issue UNDI command and check result.
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//
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DEBUG ((EFI_D_NET, "\nsnp->undi.statistics() "));
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(*Snp->IssueUndi32Command) ((UINT64)(UINTN) &Snp->Cdb);
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switch (Snp->Cdb.StatCode) {
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case PXE_STATCODE_SUCCESS:
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break;
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case PXE_STATCODE_UNSUPPORTED:
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DEBUG (
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(EFI_D_ERROR,
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"\nsnp->undi.statistics() %xh:%xh\n",
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Snp->Cdb.StatFlags,
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Snp->Cdb.StatCode)
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);
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Status = EFI_UNSUPPORTED;
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goto ON_EXIT;
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default:
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DEBUG (
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(EFI_D_ERROR,
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"\nsnp->undi.statistics() %xh:%xh\n",
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Snp->Cdb.StatFlags,
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Snp->Cdb.StatCode)
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);
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Status = EFI_DEVICE_ERROR;
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goto ON_EXIT;
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}
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if (Reset) {
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Status = EFI_SUCCESS;
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goto ON_EXIT;
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}
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if (StatisticsTable == NULL) {
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*StatisticsSize = sizeof (EFI_NETWORK_STATISTICS);
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Status = EFI_BUFFER_TOO_SMALL;
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goto ON_EXIT;
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}
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//
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// Convert the UNDI statistics information to SNP statistics
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// information.
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//
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ZeroMem (StatisticsTable, *StatisticsSize);
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Stp = (UINT64 *) StatisticsTable;
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Size = 0;
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for (Index = 0, Mask = 1; Index < 64; Index++, Mask = LShiftU64 (Mask, 1), Stp++) {
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//
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// There must be room for a full UINT64. Partial
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// numbers will not be stored.
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//
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if ((Index + 1) * sizeof (UINT64) > *StatisticsSize) {
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break;
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}
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if ((Db->Supported & Mask) != 0) {
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*Stp = Db->Data[Index];
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Size = Index + 1;
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} else {
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SetMem (Stp, sizeof (UINT64), 0xFF);
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}
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}
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//
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// Compute size up to last supported statistic.
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//
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while (++Index < 64) {
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if ((Db->Supported & (Mask = LShiftU64 (Mask, 1))) != 0) {
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Size = Index;
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}
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}
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Size *= sizeof (UINT64);
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if (*StatisticsSize >= Size) {
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*StatisticsSize = Size;
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Status = EFI_SUCCESS;
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} else {
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*StatisticsSize = Size;
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Status = EFI_BUFFER_TOO_SMALL;
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}
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ON_EXIT:
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gBS->RestoreTPL (OldTpl);
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return Status;
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}
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